Welcome to the AC Tropical Fish aquarium forum. Our aquarium forum is the place to discuss any aquarium related issue in a friendly environment. Our aquarium forum welcomes aquarists of all levels from beginners to experts. Please ask a question in the how to section of our forum or read the FAQ section if you have any questions. register to and become a part of our friendly aquarium forum community today.

I have three of these over my 20 gallon tank (one of the bulbs is a 20 watt model). My plants are literally growing out of the water. 5500K is great for growing plants. I found some 6500K at Target the other day. When these burn out I'll give those a try. But so far no complaints.